Britain has appointed a non-resident charge d'affaires to Iran as the two states are reviving relations. The thaw comes two years after Iran’s ambassador was expelled from the UK following the storming of the British embassy in Tehran in 2011.

Britain's Foreign Office said Ajay Sharma, currently the head of
the ministry's Iran department, will take up the post
immediately, Reuters reported.

At the same time Iran appointed a new charge d'affaires to the
UK, Mehr news agency said.

"Today the Islamic Republic has appointed Mohammad Hassan
Habibollah as charge d'affaires to Britain and has introduced him
to the British side," the agency reported Iran’s Foreign
Ministry as saying.

Over the last two years, Iran’s interests in the UK were
represented by Oman, and UK’s interests in Iran were looked after
by Switzerland.

The proposal to reopen embassies in Iran and UK was first voiced
on the sidelines of the UN General Assembly in New York, where
Iranian President Hassan Rouhani appealed for reconciliation
between the Islamic Republic and western powers.

In October, British Foreign Secretary William Hague said that it
was “clear that the new president and ministers in Iran are
presenting themselves and their country in a much more positive
way than in the recent past.”

In November 2011, Iranian protesters stormed the British embassy
in Tehran, prompting the UK to close its diplomatic mission in
the country and expel Iran’s ambassador to the UK.

Back then a protest started as a peaceful demonstration to
commemorate the anniversary of the death of Iranian nuclear
scientist Majid Shahriari. According to the Iranian government,
he was murdered in a joint operation by Israel’s Mossad and UK’s
MI6.

The demonstration then turned violent, as dozens of Iranian
students stormed the UK embassy in Tehran, chanting “death to
England.” On that day a group of students also climbed over
the embassy’s gate, rushed to the building and started showering
it with stones and Molotov cocktails.

Some of the protesters managed to get inside the building and
were reported to be throwing documents from the windows. They
burned documents as another group of protesters seized some
classified papers.